CONFIG_CXL_PCI: PCI manageability

General informations

The Linux kernel configuration item CONFIG_CXL_PCI:

• prompt: PCI manageability
• type: tristate
• depends on: (none)
• defined in drivers/cxl/Kconfig
• found in Linux kernels: 5.18–5.19, 6.0–6.12
• modules built: cxl_pci

Help text

The CXL specification defines a "CXL memory device" sub-class in the PCI "memory controller" base class of devices. Device's identified by this class code provide support for volatile and / or persistent memory to be mapped into the system address map (Host-managed Device Memory (HDM)).

Say 'y/m' to enable a driver that will attach to CXL memory expander devices enumerated by the memory device class code for configuration and management primarily via the mailbox interface. See Chapter 2.3 Type 3 CXL Device in the CXL 2.0 specification for more details.

If unsure say 'm'.

Hardware

PCI

Numeric ID (from LKDDb) and names (from pci.ids) of recognized devices:

• class: 05 ("Memory controller"), subclass: 02 ("CXL"), prog-if: 10 ("CXL Memory Device (CXL 2.x)")
• class: 05 ("Memory controller"), subclass: 02 ("CXL"), prog-if: 10 ("CXL Memory Device (CXL 2.x)")

LKDDb

Raw data from LKDDb:

• lkddb module cxl_pci CONFIG_CXL_PCI : drivers/cxl/Kconfig : "PCI manageability" # in 5.18–5.19, 6.0–6.12
• lkddb pci .... .... .... .... 050210 : CONFIG_CXL_BUS CONFIG_CXL_PCI : drivers/cxl/pci.c # in 5.18, 5.18+HEAD
• lkddb pci .... .... .... .... 050210 : CONFIG_CXL_PCI : drivers/cxl/pci.c # in 5.19, 6.0–6.12

Sources

This page is automaticly generated with free (libre, open) software lkddb(see lkddb-sources).

The data is retrived from:

• Linux kernel
• Linux Kernel Driver DataBase (LKDDb)
• The Linux PCI ID Repository.

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